Casement-adjuster.



ROBERT W. MORRISON, OF MONTREAL, QUEBEC, CANADA.

CASEMENT-ADJUSTER.

Specification of Letters Patent.

Application led April 10, 1914. Serial N o. 830,926.

To all 'whom it may concern.'

Be it linoivn that I, ROBERT W. MORRISON, a citizen of the Dominion of Canada, and resident of the city of Montreal, Province of Quebec, and Dominion of Canada, have iii-vented neiv and useful Improvements in Qasement-Adjusters, of which the following is a full, clear, and eXact description.

This invention relates to improvements in easement adjusters for easement or French Windows, and the object is to provide a simple, economically constructed device of this character.

Tn the 4drawings .vhich illustrate the inventionz-Figure 1 is a plan view showing the device mounted in operative position on a window. Fig. 2 is a plan viev.7 of the device partly in longitudinal section. Fig. 3 is a complete longitudinal sectional view of the device. Fig. at is a cross section. Fig. 5 is a cross section showing the device applied to a different form of bar.

Referring more particularly to the draivings, 11 designates the sash of a easement or French window, that is, a Window in which the sash is hinged at a vertical edge, and 12 the sill or lintel of the frame. The device consists essentially of a tube 13 and plunger 1-1- sliding therein, so as to form a telescopic member, one end of which is pivoted to the Window frame and the other to the sash. Tn practice, the tube 13 is pivoted near one end by a pin or rivet 15 to a suitable plate 1G, which is in turn secured either to the Windoiv sill or lintel by means of screws 17 or the like. The end of the tube is closed by any suitable cap 18. At the opposite end of the device is a second plate 19 secured to the ivindov. sash as far as possible from the hinged edge by means of screws 20. The plunger 1+i is connected to this plate by means of a pin 21 which is formed so as to be easily removable, and provided with a cotter 22 holding it in place. The end of the tube Where the plunger enters may be reinforced by a cap 23, which forms a bearing or guide for the plunger and also strengthens the tube. 'Vithin the tube 13, the end of the plunger is provided with a pair of loosely' attached plates 24 and 21, engaging diametrically opposite portions of the tube inner surface. Between. these plates 24 and 24 a comparatively stift' spring is provided. This spring is preferably of the semi-elliptic type, and is mounted by means of a rivet 26 on a seat 27 formed by displacing a small portion of the metal ofthe plate 24. This spring operates to press the plates 2/1 and 2r* away from each other and into` very close contact With the surface of the tube, so that there is very close frictional engagement. These plates` are attached to a block 32 screwed into the end of the plunger 14 with` in the tube and secured by a rivet 33 by means of a pin or rivet 23 which is preferably formed so as to hold the plates against separation from the plunger, and yet allow a certain limited movement between the plates. l This may be accomplished by forming conical apertures 29 near one end of each plate into which the ends of the rivet 2S may be slightly expanded, but not sufticiently to fill the apertures. @ne of the plates is lprovided on its edges With notches 30 and the other plate with tongues 31 engaging in said notches. This arrangement prevents independent longitudinal movement of the plates 2st and 24, so that should one of the plates become disconnected from the plunger by shearing of either plate or pin or by other accident, the other plate Will carry it along and the effectiveness of the clutch would not be impaired.

Vilhile the device will for the greater part be constructed circular in cross section, is obif'iousthat it may be made square, or of any other desired form. Tn maling up the square form, it is thought advisable 'to make division bet-Ween the plates 241, 2e@ on a diagonal of the tube, and form these plates, so that they do not project completely into the edge between adjacent sides, as shown at 35, Fig. 5. This arrangement gives the greatest caring surface for the clutch, and also the greatest space for the spring.

The device is applied to a vindow, as shown in Fig. 1, that is to say, with the device closed and practically parallel with the sash when the ivindoiv is closed. Then the Window is opened, the plunger is drawn out of the tube, the withdrawing action being resisted by the frictional engagement between the clutch and tube, so that the Window will remain at Whatever. -point it is placed. The resistance offered by the clutch is not sutiicient to render opening orclosing the Window diiiicult, but is amply sufficient to hold lthe Window absolutely rigid even in a.-very high Wind, for the reason that the points of support of the'vvindovv being at opposite edges thereof, only half the Wind pressure on the Window is received by each Fatented Sept. 26, 1916.

rio

support. Even if `the Window is not held absolutely rigid in a high Wind, it is prevented from slamming and breaking the glass. Y

The device may be used equally Well on inside or outside sashes,the removable pin 2l `facilitating the application of Athe device and the changing from Winter sashes toblinds, if the device is used for outside sashes.

Having thus described my invention, what I Claim is A .deviceoil the character described comprising a tube pivotally connectible at one end to a WindeT frame, a tubular plunger sldable in the opposite endof said tube and pivotally connectible at its opposite end to the window sash, said plunger completely filling the bore of the tube, a plug rigidly mounted in the end of said plunger, a clutch mounted on the end of said plugvvithin the tube comprising a pair of members engaging the inner surface'of the tube, one of said members having `a displaced portion intermediate its ends forming a seat, a spring.;

In witness whereof, I have hereunto setv my hand in the presence of two Witnesses.

ROBERT W. MORRISON;

lVitnesses:

S. R. W. ALLEN, G. N. MORELAND.

Copies of this patent ymay be obtained for ve cents each, by addressing the Commissioner o! Patenti',` ,Washington D. C. 

